students in grades的用法和样例：
例句
- We aim to double the number of young people in full-time study.
我们计划将全职学生的数量增加一倍。 - With the decreasing of students" quality in such schools, students become study-wearied more and more seriously, impeding the development of secondary education.
随着中等职业教育生源质量的不断下滑，中职学生厌学的现象越来越严重，已经对我国中等职业教育的发展产生了阻碍。
